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Register a new userAligNART: Non-autoregressive Neural Machine Translation by Jointly Learning to Estimate Alignment and Translate
Alignart: ترجمة الآلات العصبية غير التلقائية من خلال التعلم المشترك لتقدير المحاذاة والترجمة
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تعاني نماذج الترجمة الآلية العصبية غير التلقائية (NART) من مشكلة الوسائط المتعددة والتي تسبب عدم تناسق الترجمة مثل تكرار الرمز المميز. حاولت معظم الأساليب الأخيرة حل هذه المشكلة من خلال النمذجة الضمنية التبعيات بين المخرجات. في هذه الورقة، نقدم Alignart، الذي يرفع معلومات المحاذاة الكاملة إلى تقليل طريقة التوزيع المستهدف بشكل صريح. تقسم AlignArt مهمة ترجمة الآلة في (1) تقدير المحاذاة و (2) الترجمة مع مدخلات فك تشفير محاذاة، توجيه وحدة فك التركيز للتركيز على الترجمة المبسطة الواحدة المبسطة. لتخفيف مشكلة تقدير المحاذاة، فإننا نقترح كذلك طريقة تحلل المحاذاة الجديدة. تظهر تجاربنا أن Alignart تفوق النماذج السابقة غير التكرارية التي تركز على تخفيض طريقة صريحة على WMT14 EN↔DE و WMT16 RO → EN. علاوة على ذلك، تحقق Alignart درجات بلو مماثلة لتلك النماذج القائمة على التصنيف الزمني للدولة من الفنون على WMT14 En↔de. نلاحظ أيضا أن Alignart يعالج بشكل فعال مشكلة تكرار الرمز المميز حتى دون تقطير المعرفة على مستوى التسلسل.
Non-autoregressive neural machine translation (NART) models suffer from the multi-modality problem which causes translation inconsistency such as token repetition. Most recent approaches have attempted to solve this problem by implicitly modeling dependencies between outputs. In this paper, we introduce AligNART, which leverages full alignment information to explicitly reduce the modality of the target distribution. AligNART divides the machine translation task into (i) alignment estimation and (ii) translation with aligned decoder inputs, guiding the decoder to focus on simplified one-to-one translation. To alleviate the alignment estimation problem, we further propose a novel alignment decomposition method. Our experiments show that AligNART outperforms previous non-iterative NART models that focus on explicit modality reduction on WMT14 En↔De and WMT16 Ro→En. Furthermore, AligNART achieves BLEU scores comparable to those of the state-of-the-art connectionist temporal classification based models on WMT14 En↔De. We also observe that AligNART effectively addresses the token repetition problem even without sequence-level knowledge distillation.
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